Rail passengers face major disruption over Christmas as Network Rail completes 300 engineering projects.
The government-owned infrastructure management company said more than 95% of the network will be open but urged travelers to “plan their trips in advance”.
London Liverpool Street will be closed between Christmas Day and January 2 for works including bridge reconstruction and track maintenance.
This will affect Greater Anglia, Stansted Express and c2c services.
There will be no Southern or Gatwick Express services to or from London Victoria during the same period.
This will allow signaling and track work to take place at Clapham Junction and Balham.
Most trains will be diverted to London Bridge.
Avanti West Coast trains running between London Euston and Glasgow Central will run on a reduced timetable between Christmas Eve and December 30.
This is due to a combination of lane renewals in Harlesden, North West London; platform works at Milton Keynes Central; and bridge works in Camden, North London and Wolverton, Milton Keynes.
Renewal of signals and tracks in Lewisham, south-east London, means Cannon Street station will be closed on Christmas Eve.
There will be a reduced service for short-distance trains from London Waterloo between December 27 and New Year’s Day due to bridge reinforcement works at Battersea, south London.
The projects will cost a total of £120m.
Network Rail chief executive Andrew Haines said: ‘Christmas is an important time for the railway as it gives us the opportunity to do a lot of work to improve the railway when trains are not running, and therefore to keep disruption to our passengers to a minimum.
“We have worked closely with our train operators to ensure that the vast majority of the network is open for business over the festive period so that people can travel by train to spend time with family and friends.
“However, some of these key upgrade projects will have an impact on services, so we ask passengers to plan their journeys before traveling.
“And a huge thank you to the thousands of railway workers who will be working during this time to keep services running and provide upgrades to improve our railway, providing more reliable journeys for passengers in the future.”
Party travelers could also be further disrupted by the strikes.
Last week, the Rail, Maritime and Transport Union said a new poll of its members showed overwhelming support for continued industrial action in the long-running pay dispute, jobs and conditions.